1078 APPENDIX. 



these same shells, has declared the identity of Parkeri, Suter, and 

 fulvus, Suter, with them." This Thiele most decidedly has not done, 

 and I still consider the two species as distinct. 



Ischnochiton granulifer, Thiele, 1910. 



Ischnochiton granulifer, Thiele, " Zoologica," xxii, Heft 56, 1910, 83, pi. 8, 



I. O I OO. 



Iii size and general appearance similar to /. luteoroseus, Suter. 

 One specimen is uniformly yellowish, the other whitish, indistinctly 

 marbled, and with a few symmetrical reddish-brown spots near the 

 lateral margin. The valves are rather strongly convex, angled at 

 the middle, sides convex. The whole surface is covered with roundish 

 granules, the lateral areas are hardly defined, the tail valve has a 

 central mucro with a concave posterior slope. Head valve with 13, 

 tail valve with 8, slits. The minute scales of the girdle beset with 

 numerous small globules fastened to a thin stalk. Marginal bodies 

 symmetrically striated. 



Length, 6 mm. ; breadth, 3-5 mm. 



Type in the Kgl. Zoolog. Sammlung, Berlin. 



Hob. The two specimens were collected in New Zealand by Dr. 

 Thilenius, no exact locality being given. 



Plaxiphora biramosa, Quoy and Gaimard, 1835. 



Thiele, who has examined the type specimens, says that I recog- 

 nized the true P. biramosa, and he gives (I.e., 27) an amended diag- 

 nosis of the species. 



Iredale (I.e., pt. 2, 93) includes Tonicia corticata, Hutton, as a 

 synonym, and he is most likely right. The type of Hutton's species 

 seems to be lost, and I placed it as a synonym under Acanthopkura 

 granulata after Hutton assured me that a much-damaged shell of the 

 latter which I showed him was really his T. corticata. 



Plaxiphora caelata, Reeve, 1847. 



Iredale (I.e., pt. 2, 92) records the details of the types of P. ccelata 

 and P. terminalis, E. A. Smith, and he mentions that the latter fully 

 agrees with the description and figures of P. Schauinslandi, Thiele. " 



Plaxiphora terminalis, E. A. Smith, 1874. 



Chiton (Plaxiphora) terminalis, E. A. Smith, Ereb. & Ter., 4, pi. 1, f. 13. 

 Plaxiphora Schauinslandi, Thiele, "Zoologica," xxii, Heft 56, 1909, 

 28, pi. 3, f. 41-43. 



The species is distinguished from P. ccelata by its larger size, the 

 more distinct mucro of the intermediate valves, the slightly finer 

 sculpture, the more elevated sutural laminae, and the deeper sinus, 

 which is convex, but almost straight in P. ccelata. It may be classed 

 as a subspecies of the latter. 



