33 299 



There is no canal for the lateral line in any of the cranial bones, nor in the 

 preoperculuui and preorbitals described below. 



The mouth-parts are fairly large, except the intermaxilla (PI. V, üg. 4, 5 i); the 

 latter and particularly the maxilla (mx) is bound by strong ligaments to the snout- 

 cartilage, the maxilla besides to the vomer and — as usual — to the maxillary 

 process of the palatine. The mandible has three parts: the articular (ar) and dental 

 (d) form together a large process for a branch of the tendon of the M. adductor 

 mandibulœ (another is attached to the maxilla); the angular (an) is small and 

 as usual connected by a strong ligament — here a long one — with the interoper- 

 culum. 



Teeth are completely wanting on all the bones of the mouth and pharynx, 

 also on the branchial arches. Of the suspensory parts the hyomandibular (hy) is 

 stout, fairly short and, contrary to the case in Aulostoma and Fistularia, very little 

 sloping forwards. On the upper inner margin it has a wing-like expansion, joined 

 by ligament to the prootic as mentioned above; the lower end is cartilaginous 

 and connected with the proximal part of the horizontal sympleclic (sy); the latter 

 is joined to a process on the inner side of the slylohyal by a long ligament (1). 

 The symplectic bifurcates into two branches; the lower fork is horizontal, continuing 

 the horizontal stem and enclosing a cartilaginous axis; in front it joins the quadrate 

 (qu); the upper fork is an oblique plate connected with the two antorbitals (ao, ao') 

 (particularly with the posterior, the preorbital proper), replacing so to speak the 

 metapterygoid, which is completely wanting. The upper branch of the symplectic 

 is bound to the skull by connective tissue. 



The quadrate (qu) is much elongated, its outer face convex, the inner concave, 

 behind it is pointed, broadening anteriorly; the front margin, contrary to the case 

 in Aulostoma and Fistularia, slopes from behind forwards. The outer face is sculp- 

 tured and carries a longitudinal ridge from the posterior end to the articular head 

 for the mandible. The upper margin is for a long way not in contact with the 

 pterygoid, a feature not to be found in the genera hitherto described. Only two 

 pterygoids ai-e developed; the ectopterygoid (ect), bent, with the front part joining 

 the palatine (pa), the hind part connecting with the entopterygoid (ept) and the 

 anterior margin of the quadrate; the latter also joins the anterior broad part of the ent- 

 opterygoid, which tapers backwards to a point without reaching to the symplectic. 

 The outside of the entopterygoid is covered by the anterior preorbital bone (ao'), 

 except in front, their upper margins being joined. 



The short palatine (pa) carries a prominent maxillary process. The preoper- 

 culuui (pro) has a short ascending part covering part of the front face of the hyo- 

 mandibular and extending to the cheek, embracing the origin of the cheek-muscle; 

 the horizontal part is long, in front joining the posterior preorbital (ao) and — with 

 a long oblique suture —the quadrate; the inner face caries a horizontal ridge con- 

 necting with the symplectic; (behind and) below the cartilaginous proximal end of 

 the latter is the articular fossa for the stylohyal. The whole outer face is sculp- 



1). K. 1). \ idcii^k. Selsli. Sl.r., 7. Hække, naturvidensk. og matheni. Aid. Vlll. 5. 39 



