MUSEUM OF COMPARATIVE ZOOLOGY. 7 



plicated openings of the oviducts were free from the body wall and attached 

 to the parietal band on the anterior edge of the intestine a little way above 

 the heart : first, by a tendinous process of considerable toughness ; and, 

 secondly, by the end of the plicated membrane itself. Between the two 

 attachments a small foramen appeared, which seemed to be normal, but 

 may possibly have been due to a lesion of the tissues. The heart in most 

 specimens was pyriform and of moderately large size ; in one or two it 

 appeared of an hourglass shape, probably due to contraction. The dis- 

 position of the vessels was similar to that described by Hancock in Tere- 

 bratulina caput-serpentis, as far as I was able to determine. 



A very careful search was made for accessory pulsatile vesicles, but 

 none were discovered, though I do not feel positive that they may not ex- 

 ist. The vessels which supply the genitalia are much looped and reticu- 

 lated. The genitalia, as before mentioned, are situated in a reticulated 

 series of sinuses, on the surfaces of the sides of the perivisceral tissues ; 

 this series does not pass in front of the muscular attachments, as far as I 

 have been able to discover by repeated and careful examinations. It 

 would seem as if this portion represented the pallial sinuses of Hancock, 

 which exist in other genera, but which, in this species at least, seem to be 

 suppressed anteriorly. The lacunes of the anterior portion of the mantle- 

 lobe are homologous with the inner and outer pallial lacunes of Hancock. 

 The genitalia agree in general features in all the specimens examined. 

 They are of a yellowish color, and all appeared destitute of the reddish 

 granular substance noticed in other species. On the other hand, a similar 

 accumulation of reddish-yellow granules appears in the glandular funnels 

 of the oviducts, which open by an oval and rather large aperture on each 

 side, behind, and a short distance above the mouth. 



Above and behind the mouth, and directly in front of the anterior 

 occlusor (retractor) muscles, the external tissues of the perivisceral mem- 

 brane are thickened, or a mass of cellular tissue is interposed between the 

 laminae of the membrane. This causes a protuberance almost exactly 

 resembling in shape and appearance a human nose. Below the inferior 

 and most prominent portion of this protuberance is a deep groove or 

 incised line, under which is another protuberance, short, wide, and trans- 

 verse, shaped like a roll of parchment. For want of a better name I pro- 

 pose to call the lower protuberance the supra-ccsophageal body; the 

 fissure, the inter-corporeal groove; and the upper protuberance, the nasi- 

 form body. 



These organs do not exist in any of the species of Brachiopods (except 

 T. cubetisis) with which I am acquainted. Nothing of the kind is to be 

 seen in W. floridana, Terebratella coreanica, T. caurina, Waldheimia 

 Jlavescens, etc., etc. I am unable to say whether it occurs in T. vilrea, 



