271 
the collection as illustrative of distribution less exact than it might 
have been. A few specimens of considerable interest were taken by 
the ‘ Herald’ at Cape Krusenstern. The new species are all from the 
American shores. There are no products of deep-sea dredging. 
As many of the following new forms are from the coast of Ma- 
zatlan, Mr. Cuming, whose experience and advice has been taken, 
and magnificent collection consulted in drawing up this report, has 
considered it desirable that some undescribed shells contained in his 
collection, from that region, should be described and figured at the 
same time. 
Trochita spirata, sp. nov. (PI. XI. fig. 1.) 
T. testd conica, fusco-purpured, longitudinaliter radiato-sulcatd, 
sulcis numerosis, prominentibus, subrugosis ; anfractibus 6, angus- 
tis; lamina interna spirali, depressd, magna, margine undulato. 
Diam. 2^, alt. ly^- unc. 
A very handsome species of this group, allied to Calyptrcea sor- 
dida of Broderip, and differing from the well-known T. trochiformis 
in having very much narrower and more numerous whorls, as well as 
in its internal colouring. It was procured at Massaniello, in the 
Gulf of California. 
Trochus castaneus. Nuttall, MSS. (PI. XI. fig. 9.) 
T. testd late-conicd, crassd, late castaned, spiraliter flavo-lineatd, 
anfractibus 6, convexiusculis, omnibus spiraliter sulcatis, sulcis 
numerosis, ultimo lato, basi subangulato, convexo, imperforato, 
apertura subquadratd, margaritaced, suturis impressis. Oper¬ 
culum ? 
Alt. t 8 q-, lat. T V, long, apert. unc. 
The number of sulcations in the second whorl is about six ; the 
cavities are always rich chestnut, the elevations yellowish. The ge¬ 
neral form is intermediate between that of ziziphinus and alabastrites. 
The shell has long been known under Nuttall’s manuscript name, 
but never, so far as I am aware, described. It is from Upper Cali¬ 
fornia. 
Trochus (Monodonta) gallina, sp. nov. (PL XI, fig. 8.) 
T. testd obtusepyramidali, crassd (adultusponder osus), spird magna, 
anfractibus 5, glabris, obsolete oblique striatis, convexiusculis, 
albidis, fasciis angustis numerosis purpureis ornatis, anfractu 
ultimo grope suturam subcanaliculato, basi lateribus rotundatis, 
umbilico albo, imperforato, impresso, aperturd subquadratd, labro 
externo subpatulo, margine acuto, lavi, nigrescente, labro colu- 
mellari bidentato, albo, faucibus margaritaceo-albis, operculo cir- 
culari, corneo, fusco, spiris numerosissimis, confertis. Testa 
junior spird depressiuscidd. 
Alt. 1^, lat. max. 1^, alt. apert. 0^- unc. 
Probably from the Mazatlan coast. 
Trochus (Monodonta) aureo-tinctus, sp. nov. 
(PI. XI. fig. 7.) 
T. testd obtuse pyramidali, crassd, spird mediocri , anfractibus 4 vel 
